SCHOHARIE FAUNA IN MICHIGAN 719 



Meristella nasnta; range, Schoharie to Onondaga or Hamilton. 



Stropheodonta demissa; range, Schoharie to Hamilton. 



Pentamerella arataj range, Schoharie to Onondaga. 



Bhipidomella alsa; range, Schoharie. 



Stenochisma cf. Carolina; range, Onondaga of northern Ohio and falls of 

 Ohio. 



Phacops cristata, Schoharie to Onondaga. 



Prcetus latimarginatus, Schoharie. 



Dalmanites cf. ancliiops, Schoharie to Onondaga. 



No typical Onondaga species occurs in the fauna, but all are typical Scho- 

 harie, though a number range up into the Hamilton, There can, then, be no 

 doubt that this is a typical Schoharie fauna, and that the beds containing it 

 are of Schoharie age, rather than Onondaga, as generally held. These beds 

 are overlain by purer calcarenytes of Onondaga age, ranging 96 per cent or 

 over in CaCO s . The higher beds are brecciated, forming a typical calcirudyte 

 like that of Mackinac island. It is believed that the beds with the Schoharie 

 fauna are the lowest of the series, and that the Monroe (Upper Siluric) beds 

 underlie them. Since the beds of Mackinac island contain an Onondaga fauna, 

 it is evident they can not be lower than those of Mill creek, but the equivalent 

 of the higher (brecciated) beds of that locality. Hence there is a decided 

 flattening of the dip, so that beds at 150 feet above the water level at Macki- 

 nac island appear on the main coast at the level of the lake. Instead, then, of 

 a dip of about 30 feet to the mile, or of 40 feet as it is farther east, the dip 

 here is only 15 feet to the mile or even less. 



The matter of the paper will be published in the geological reports of 

 the state of Michigan. 



The remaining papers of the program were presented by title, as 

 follows : 



LITHOLOGIGAL CHARACTER OF THE VIRGINIA GRANITES 

 BY THOMAS LEONARD WATSON 



The paper is printed as pages 523-540 of this volume. 



RELATION OF CELESTITE-BEARING ROCKS TO OCCURRENCES OF SULPHUR 

 AND SULPHURETTED WATERS 



BY EDWARD H. KRAUS 



NEW SPECIES OF SODA-ALUMINA PYROXENE 



BY S. WEIDMAN 



ORIGIN OF LEACHED PHOSPHATES 



BY C. H. HITCHCOCK 



GRADED SURFACES 



BY F. P. GULLIVER 



LXIV — Bull. Geol. Soc. Am., Vol. 17, 1905 



